/*  The MIT License (MIT)
 *
 *  Copyright (c) 2021 Huawei Device Co., Ltd.
 *
 *  Permission is hereby granted, free of charge, to any person obtaining a copy
 *  of this software and associated documentation files (the "Software"), to deal
 *  in the Software without restriction, including without limitation the rights
 *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 *  copies of the Software, and to permit persons to whom the Software is
 *  furnished to do so, subject to the following conditions:
 *
 *  The above copyright notice and this permission notice shall be included in all
 *  copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 *  SOFTWARE.
 */
import {retrieveSigningKeys} from '../utils';

/**
 * Uses getKeysInterceptor to allow users to retrieve keys from a file,external cache, or provided object before falling back to the jwksUri endpoint
 */

export function getKeysInterceptor(client, { getKeysInterceptor }) {
    const getSigningKey = client.getSigningKey.bind(client);

    return async (kid) => {
        const keys = await getKeysInterceptor();
        let signingKeys;
        if (keys && keys.length) {
            signingKeys = retrieveSigningKeys(keys);
        }
        if (signingKeys && signingKeys.length) {
            const key = signingKeys.find(k =>!kid || k.kid === kid);
            if (key) {
                return key;
            }
        }
        return getSigningKey(kid);
    };
}



